Fuel injector size?

rx7-5.0 · May 20, 2009

got an 88 rx7 wit mustang 5.0 in it. Has trick flow heads, intake, has mild cam, 75mm mass air flow meter, 65 mm throttle body etc..........but only has 19lb injectors. it seems that sometimes it will kinda fall on its face when you get on it. Im definetely thinkin i need bigger injectors (already got a 255 walbro fuel pump). So my question is what size injectors I need. 24lb or 30lb? and would I have to get a different mass air meter? thanks

BlownFiveLiter · May 20, 2009

to :SNSign:

30's would give you a little bit more of a safety net, but FRPP doesn't sell them anymore, so you may be stuck looking in the used market if you're unable to find unsold stock somewhere. Depending on the manufacturer of your MAF, you could likely send it back to be recalibrated. Otherwise, a tune could easily make up for the difference in calibration between the MAF and injectors.

Strype · May 20, 2009

If it's a C&L you can buy a sampling tube for $40

rx7-5.0 · May 20, 2009

well i can get some good used 30s and a speed brain computer that can calibrate it for 250......good deal?

rx7-5.0 · May 20, 2009

it is a C&L mass air meter. who sells the sampling tubes?

Strype · May 20, 2009

C&L Calibration Tube Chart

Good question I got mine from Ebay, but I did see them elsewhere. Maybe it was Summit?

BlownFiveLiter · May 20, 2009

rx7-5.0 said:
well i can get some good used 30s and a speed brain computer that can calibrate it for 250......good deal?

That's definitely a good deal in my book.

Wow, Speedbrain? Haven't seen one of those around since about 2001ish. It was a good concept, but it never caught on back then. I do believe it was the first stand-alone from the aftermarket, save for the EPEC from Ford. The AEM is pretty much the equivalent, nowadays.

rx7-5.0 · May 20, 2009

Is the speedbrain a good piece of equipment to have? it seems like a good concept that didn't catch on, but is it really that good? should I put it in my car

StangAlang0811 · May 20, 2009

if your lookin for new 30's, i do believe CJ pony parts just started selling 30's... There new book has them in it anyways.

Fuel injector size?

rx7-5.0

New Member

BlownFiveLiter

have car, will race....wait, it doesn't run

Strype

Cuthbert catcher

rx7-5.0

New Member

rx7-5.0

New Member

Strype

Cuthbert catcher

BlownFiveLiter

have car, will race....wait, it doesn't run

rx7-5.0

New Member

StangAlang0811

New Member

Similar threads

Fuel injector size?

New Member

have car, will race....wait, it doesn't run

Cuthbert catcher

New Member

New Member

Cuthbert catcher

have car, will race....wait, it doesn't run

New Member

New Member

Similar threads

Privacy & Transparency

Privacy & Transparency